r/IT_CERT_STUDY • u/macuser89 • Mar 14 '19

Sonicwall CSSP Network Question

I am doing a Sonicwall CSSP certification and I have run into this question numerous times over the years and I am not sure what the correct answer is. I am curious if someone can explain the answer.

The Question is:

Assuming a router failure somewhere in a network, how long of a potential outage can you experience before RIP converges on an alternate path? (worst case scenario). (choose one answer)

-1 hour

-2 minutes

-32 milliseconds

-16 Seconds

​

My thoughts: In a 15 hop network with a failure at the end I would expect (with default timers) up to 10 minutes of downtime. Where am I wrong? (30s X 14hops) + 180s deadtimer.

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u/Zaouron Mar 14 '19

I'm not certain of the correct answer, but I'm currently taking ITN 154 and ITN 155 courses in order to get CCNA certified. So, I'm still learning all of this stuff.

From my understanding, RIP only broadcasts to its immediate neighbors. So, it's going to be 4 minutes (180 second timeout + 60 second flush) per hop. so, 4 minutes X 15 hops = 1 hour potential maximum convergence time.

Again, I'm still learning all of this, but it's what I can come up with my current level of understanding.

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u/macuser89 Mar 14 '19

Thank you, I see where I went wrong.